History: A 30 year old male involved in a MVA presented complaining of right shoulder pain.

Findings: Shoulder Plain Films:
The humeral head is internally rotated and laterally displaced on AP view with decreased, glenoid-humeral overlap. A linear lucency along the anterior margin of the humeral head is identified. On scapular-Y view, there is posterior displacement of the humeral head from the glenoid fossa.
IMPRESSION: Right posterior humeral dislocation with impaction fracture along the anterior humeral head.
Shoulder CT:
There is posterior dislocation of the right shoulder with a prominent longitudinal impaction fracture of the anterior humeral head positioned on the posterior aspect of the bony glenoid.
IMPRESSION: Posterior right shoulder displacement with longitudinal impaction fracture of the humeral head.

History: A 30 year old male involved in a MVA presented complaining of right shoulder pain.

Findings: Shoulder Plain Films:
The humeral head is internally rotated and laterally displaced on AP view with decreased, glenoid-humeral overlap. A linear lucency along the anterior margin of the humeral head is identified. On scapular-Y view, there is posterior displacement of the humeral head from the glenoid fossa.
IMPRESSION: Right posterior humeral dislocation with impaction fracture along the anterior humeral head.
Shoulder CT:
There is posterior dislocation of the right shoulder with a prominent longitudinal impaction fracture of the anterior humeral head positioned on the posterior aspect of the bony glenoid.
IMPRESSION: Posterior right shoulder displacement with longitudinal impaction fracture of the humeral head.